My husband is longer but not thick. Advice on how to improve our quality of sex?

Hello! I’m 34(f) and have been with my husband 37(m) for 9 years. I love him tons but our sex life is only so-so. We have sex about once a week and I’m trying to increase both the quantity and quality. We’re in couples therapy to increase communication and even though he also wants to improve our sex life, he's very uncomfortable talking in front of a third person and he’s struggling. We Are trying new positions a lot more and I’ve spent a lot of time recently really analyzing what my body likes and doesn’t like; trying to be more explicit with him because I know he can’t read my mind. I’ve realized recently one of the bigger issues we have is that we don’t always fit together in the right way. He’s long enough (almost too long sometimes and a bit painful) but not thick enough. He’s thinner than my previous partners and I’m realizing that thickness and stretch is really my jam. I don’t always feel him. I can still get off clitorally but often feel myself wishing for more - and feel guilty about it. Does the community have any advice on how to talk to him about this (should I?) and/or things we could do to help in this arena? He‘s open to toys but if I explain this is the reason why, I’m fairly confident he’ll take it personally and get upset. Thanks all.

Update: I’m (positively) overwhelmed with how much incredibly sage and practical advice has come through in less than 12 hours. My perspective is dramatically shifting - on just how many options we actually have to experiment with, how normal this can be, how to keep it fun and take off the pressure, how to better communicate, and how it could feel from his point of view. Also it’s one thing to know how dangerous certain words and phrases can be in a relationship and it’s another thing to Know by hearing from those who have experienced this hurt before from former partners. I’m sorry you went through that at all but I hope it helps that you may have stopped me from making serious mistakes here. I don’t have anyone to really talk to about this stuff so some things that should’ve been obvious were less so for me. I appreciate everyone’s advice here (even the really blunt pieces) and I Promise to take it all very seriously. Y’all on Reddit are the equivalent to a year or more in therapy. Thank you So much!